TOPIC
Stories and answers about #Cosmology
FROM THE QUESTION LIBRARY
OriginsAnswer
Several serious ideas in physics allow other universes, so here is what each one says, how scientists have tried to test them, and how a scientific braneworld differs from the multiverse in the movies.
OriginsAnswer
Scientists have measured the hot early universe in detail, but whether time itself had a first moment is still an open question.
The UniverseAnswer
We can’t see dark matter, but we can measure its pull in five different ways, so here is the evidence, the case for changing gravity instead, and what is still unknown.
OriginsAnswer
The part we can see has a limit, space looks flat, and flat can still mean finite, so here is what the evidence says and why the final answer may stay out of reach.
God & BeliefAnswer
Georges Lemaître, a Belgian priest and physicist, proposed the ideas that grew into the Big Bang, and he worked hard to keep his science and his faith distinct.
OriginsAnswer
An earlier history needs a calculable path to a measurement that separates it from competing explanations.
The UniverseAnswer
A vast number of stars does not mean their light has filled every direction for an unlimited time.
OriginsAnswer
Physics can trace the universe back a long way, but every answer starts with something already there, so here is what science, faith and philosophy each offer.
The UniverseAnswer
The Sun has about 5 billion years left, and the universe may fade out over trillions of years, so here is what the evidence says about each possible ending.
The UniverseExplainer
Galaxies spin too fast and light bends too much, so something unseen seems to be out there, but nobody yet knows what it is.
The UniverseExplainer
In 1998 astronomers found that the universe's expansion is speeding up, and "dark energy" is the name for a cause nobody yet understands.
The UniverseExplainer
The Big Bang should have left an almost empty universe. A tiny surplus of matter built everything we know, and nobody yet knows why.
OriginsExplainer
From the first atomic nuclei back to a possible burst of inflation, here is what scientists have tested about the first second, and where knowledge runs out.
OriginsExplainer
The part we can see is about 93 billion light-years wide, but whether the whole universe ends, loops back or goes on forever is still unknown.
God & BeliefEssay
The 'war' between science and religion makes a dramatic story, but the real history, and what scientists actually believe, is more surprising and more welcoming.
HD-Blast ResearchExplainer
The seven questions behind Ricardo Maldonado's research, from the Big Bang to evolution: what each idea proposes, what has been corrected, and what could settle it.
OriginsExplainer
Distant light lets us look far into the past. But the earliest light we can receive arrived after the universe had already been changing for a long time.
OriginsExplainer
LIGO measured tiny changes in distance and opened another way to study the universe.
OriginsExplainer
A star’s light comes from fusion. Its long history also helps explain the matter that makes planets and people.
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